ABSTRACTTensile strength was measured on 30 wt% glass fiber-reinforced postconsumer waste and postindustrial waste recycled nylon blends. Fatigue tests were performed under load control at a stress ratio of 0.1 at temperatures of 24 and 120°C. It was found that increasing temperature led to a significant decrease in both tensile strength and fatigue life. For unwelded postindustrial waste/postconsumer waste blends, the endurance ratio was approximately 50% regardless of the temperature. For welded postindustrial waste/postconsumer, a similar endurance ratio was observed at room temperature, but it decreased to 33% at 120°C due to the presence of polypropylene found in the postconsumer component.